Heating-tube for tubular steam-boilers.



. E. PIELOGK. HEATINGTUBE FOR TUBULAR STEAM BOILERS.

APPLICATION FILED JULY 13, 1908.

948,741.. Patentd Feb.8, 1910.

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EDUARD PIELOCK, OF BERLIN, GERMANY,

HEATING-TUBE r03. TUBULAR STEAM-BOILERS.

Specification of Letters Patent.

Patented Feb. a, mic.

application filed July 13, 1908. Serial No. 443,307..

To all whom it may concern:

Be it known that I, EDpARD PIELOCK, a subject of the German Emperor, and resident of Berlin, Germany, have invented certain new anduseful Improvements in Heating- Tubes for Tubular Steam Boilers, of which the followin is a specification. A

This invention relates to improvements in heating tubes for tubular Isteam boilers, which generally have a maximum diameter of 4 inches-and its object is to insert therein open rings, which may be also made in spiral form, or the rings inserted are closed and arranged eccentric, said rings being designed to performthefunctions of a battle and so disposed that they do not form any impediment to the cleaning of the tubes.

The open or the eccentric closed rings offer the advantage that on the one hand the gases which are imperfectly oxidized are by their being intimately mixed again brought to a higher oxidation-degree whereby the combustion of the same becomes more perfeet, a suflicient air supply being of course essential therefor while on the other hand d in the smoke-chamber is much finer than with heating tubes without rings, the rin s acting in this case as s ark catchers so that the larger coal particles which are led through the tube b the in tense air draft are on the rings ashed to.

pieces and escape as such through the flue 1n red-hot condition. A further advanta e of the rings consists in that by inserting t e uniform distribution of the. heating gases on same into a part of the heating tubes a more all tubes is obtained. As known, the gases take the shortest way to the flue so that mostly,-de ending on. the vacuum in the smoke-chamber or on the draft of the flue, the ases escape through the lower and lateral eating tubes, which-especially in locomotives can be seen from the larger de osition of ashes therein, By the nonuni orm therein and designe tions of a bafile.

passage of the gases through the tubes the latter are of course also strained in a nonuniform way, but when rings are inserted in the highest str'ained tubes the resistance in these tubes is somewhat increased for the gas passage and therefore a larger gas quantity is led through theless strained tubes without rings.

The accompanying drawing shows the subject'matter of the invention.

Figures 1 and 2 are cross sections through a heating tube with different forms of open ring, while Fig. 3 is a longitudinal section through the same; Figs. 4 and 5 show in cross and longitudinal section respectively a heating tube'provided with" an open s iral rin and Figs. 6 and 7 are a longitu inal an cross section respectively through a heating tube provided with a closed eccentervals therein to perform the functions of a battle and so disposed as to form no impediment to the cleaning of said tube,

2. In a heating tube for tubular steam boilers,"eccentric ri s mounted at intervals to perform the func- In testimony whereof I have hereunto set my hand in the presence of two subscribing wltnesses. V EDUARD PIELOCK. Witnesses: I

WOLDEMAR HAUPT, I HENRY HASPER. 

